Studium luminiscence kationických barviv zachycených na fylosilikátech

Abstract

Aim of this thesis is intercalation of surfactants and methylene blue (MB) into a montmorillonite SAZ-1 in order to find suitable methods of preparing fluorescent material used in the photochemistry. Three type of cationic surfactants (hexadecyltrimethylammonium bromide (HDTMA), cetylpyridinium chloride (CPC), tetramethylammonium chloride (TMA)) were used for intercalation. An effect of surfactant on an aggregation of MB in aqueous solution was researched. Spectral changes in the dye/surfactant system of the same charge are not observed. Intercalates of surfactant/SAZ-1 and surfactant-MB/SAZ-1 containing 10, 70, 140% surfactant and 5% MB have been prepared. The intercalates were tested by X-ray diffraction, fluorescence and infrared spectroscopy and surface analysis. The fluorescence of intercalates depended on the amount of intercalated surfactant and aggregated forms of the dye. The intercalate of CPC-MB/SAZ-1 containing 140% of the CPC and 5% MB was obtained with the maximum value of fluorescence intensity, due to the presented MB monomers and long carbon chain of surfactant, which promotes the formation of J-aggregates of MB showing fluorescence.